package com.itheima02;

public class Demo02 {
    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder();

        long time1 = System.currentTimeMillis();

        for (int i = 0; i < 100000; i++) {
            sb.append("a");
        }
        long time = System.currentTimeMillis();
        System.out.println(time - time1);


    }
}
